<div>
	<el-dialog :title="title" :visible.sync="dialogVisible" append-to-body>
		<el-card style="max-height: 300px;">
			<el-tree ref="tree" :load="loadNode" :lazy="true" :props="defaultProps"></el-tree>
		</el-card>
		<span slot="footer" class="dialog-footer">
			<el-button @click="dialogVisible = false">取 消</el-button>
			<el-button type="primary" @click="save">确 定</el-button>
		</span>
	</el-dialog>
</div>